Jimmy Walker stumbled and sputtered but had just enough composure left Sunday to not be called a choker.

Walker parred the 18th hole at Pebble Beach Golf Links with a 5-foot putt and claimed a 1-stroke victory over Dustin Johnson and Jim Renner at the AT&T Pebble Beach National Pro-Am.

Walker, who had six-stroke lead after 54 holes, had a final-round 74 and finished at 11-under 276. He claimed his third PGA Tour victory in eight tournaments dating to last October in the new wraparound season.

Walker received $1.188 million for the win. He tops the PGA Tour money list this season with more than $4.1 million.

The predicted nasty weather never arrived and the final round was played in periodic slight rain, mild winds and overcast skies.

Winds gusting to nearly 40 mph postponed the event for the second time Saturday. The event was also halted twice because of darkness.

Twelve players completed their third rounds beginning at 7:45 a.m. Sunday. The final round began at 9 a.m., an hour later than originally scheduled.

“You've got to hand it to the guys who shot good rounds out there,” said Walker, who is in his ninth PGA Tour season. “I just struggled a little bit with the speed of some of these greens, some of the chipping and I hate three-putting.”

Walker seemed to have an ample cushion. Except, of course, the course was Pebble Beach, the layout notorious for making golfers consider swearing off the game only to come back for more.

After missing a 5½-footer for par at 17, one of those 3-putt holes, Walker led by one shot with one hole left. He had three bogeys in his final six holes.

Hoping for a safe play, Walker opted to use an 4-iron off the 18th tee. It landed just shy of a fairway bunker to the right and into high grass and weeds. Walker hit his second shot along the right side just off the fairway. His third shot landed 27 feet, 4 inches from the pin. His first putt was too strong and slid just past the hole.

Walker escaped a three-way playoff making his final par with a hard stroke and with the ball slipping into the left corner of the hole.

Jordan Spieth (67) and Kevin Na (69) tied at 279.

Walker's 74 marked the fourth time in the past 20 years at Pebble Beach the score has proved victorious. Johnny Miller (1994) Dustin Johnson (2010) claimed AT&T Pro-Am wins with 2-over scores. Graeme McDowell did the same in the 2010 U.S. Open.

“I've been working hard and it's really cool to see all of this happen,” Walker said.

Walker bogeyed the opening hole but birdied the second and eighth to move to 14-under , six ahead of Hunter Mahan after nine holes.

Johnson, the 2009 and 2010 AT&T Pro-Am winner, began the day at 4-under, but finished the front nine with a birdie and moved to 7-under after a 33.

That's when Walker quickly faltered. He had a birdie on No. 11 but bogeys on Nos. 10, 12 and 14 as Johnson and Renner began to compile birdies.

Johnson's charge began with an eagle on No. 2. He also birdied three of the final four holes, including the 18th, to fashion the day's low round and move to 10-under.

“I had a bogey on 12 and I missed a good chance for birdie on 14,” said Johnson, who began the final round trailing Walker by nine shots. “But I really played solid. I hit a lot of great shots and made a lot of birdies.”

Johnson hadn't played on the PGA Tour for several weeks, but had an eagle and seven birdies in the final round.

“I played really well down the stretch, so I am pleased with it,” he said.

Renner completed his 31 back nine, also with a birdie, and progressed into the clubhouse a few minutes after Johnson.

“This is the position I would like to be in more often,” said Renner, who hasn't won a PGA Tour event, but who now has two runner-up finishes. “That's one of the things I think kind of resonated with me is that I said, 'alright it's time to step up your game.'”

McDowell had two briefs sprees and moved into momentary contention. Playing for the first time at Pebble Beach since his national title, McDowell had seven birdies, but bogeys to start and finish his opening nine stymied any substantial chance to further push Walker.

“I birdied 12, 13 and 14 which sort of kick-started the day,” said McDowell, who finished with a 67 and tied at 6-under 281 with Pat Perez who had his second straight 71.